There are no perma bans on the server, just temp, ranging from 5 minutes to a few hours--to let things cool down. If it was a auto ban you had to shoot 3 differnt teammates in a row. Its scripted.
If somebody was shooting at you, my best advice is to let it go because the server will not allow it to happen long, and it will kick/slay/temp ban/perma ban depending upon hwo many times it occours..
You are not banned, and have not been banned as of this writing.